Mini Bottle Gallery, Oslo

Make like Alice in Wonderland with a visit to this trippy museum of tiny bottles. Said to be the only museum of its kind in the world, Oslo’s Mini Bottle Gallery is home to more than 53,000 fun-sized bottles.

Although you can’t actually drink any of the items on display, you’re very much encouraged to have a go on the slide that takes you down to the hugely surreal ‘Horror Room.’ Curiouser and curiouser.

The Mini Bottle Gallery, Kirkegata 100153, Oslo

Froggyland, Split

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If you're like us and want to know what a frog would look like playing tennis, going to school or being a carpenter then the fantastically strange Froggyland is a museum you need to visit.

Over 500 frogs are displayed in every day situations you would typically find a human doing, it's an unfroggetable experience.

Froggyland, Ul. kralja Tomislava 5, 21000, Split, Croatia

Devil’s Museum, Kaunas, Lithuania

Chock-a-block with cuddly stuffed toys and antique wood carvings, Kaunas’ Devil Museum is a lot friendlier in reality than the nasty den of iniquity you might imagine.

Founded by artist and local eccentric Antanas Žmuidzinavičius, who collected over 2,000 representations of devils and demons from all over the world, pieces vary from political sculptures (Hitler and Stalin as devils, performing a dance of death), to twigs and pebbles that bear a passing resemblance to the Prince of Darkness.

Žmuidzinavičius Museum, V. Putvinskio g. 55, Kaunas 44211

Neon Muzeum, Warsaw

They say one man’s junk is another man’s treasure. Fortunately for visitors to Warsaw, David Hill and Ilona Karwinska had a brilliant light-bulb moment back in 2005 when they decided to turn their prized collection of cold war-era neon signs into an offbeat museum.

Since then, the museum collection has rapidly grown in size to hundreds of kitsch, glowing pieces and now boasts the largest collection of neon signs anywhere in Europe.

Neon Museum, Mińska 25, Soho Factory, Building 55

Museo Atlantico, Lanzarote

Snorkel and flippers at the ready. Museo Atlantico, located 12 metres below the surface of Lanzarote’s south coast is Europe’s first underwater museum.

The collection features human sculptures created by British artist Jason deCaires Taylor, who was also behind the underwater museum off the coast of Cancún in Mexico.

Each of the statues in Museo Atlantico was created to encourage underwater life and will eventually expand to include around 300 exhibits.

Salt and Pepper Shaker Museum of Guadalest

Located around 25km from Benidorm, the Museo de Saleros y Pimenteros (the salt and pepper shaker museum) is owned and managed by archaeologist Andrea Ludden.

Over the past 30 years, she has accumulated around 20,000 novelty salt and pepper shakers, featuring a range of colourful characters from cheeky 1960s Beatles to dinky little kangaroos. The museum in Guadalest is the second Salt and Pepper Shaker Museum set up by Andrea and her husband.

They’ve also been running a sister museum in Gatlinburg, Tennessee since 2001. Now that’s dedication.